from The American Heritage® Dictionary of the English Language, 4th Edition

  • intransitive v. To engage in a spoken exchange of thoughts, ideas, or feelings; talk. See Synonyms at speak.
  • intransitive v. Archaic To be familiar; associate.
  • n. Spoken interchange of thoughts and feelings; conversation.
  • n. Obsolete Social interaction.
  • adj. Reversed, as in position, order, or action; contrary.
  • n. Something that has been reversed; an opposite.
  • n. Logic A proposition obtained by conversion.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Opposite or reverse.
  • n. The opposite or reverse.
  • n. Of a proposition or theorem of the form: given that "If A is true, then B is true", then "If B is true, then A is true." equivalently: given that "All Xs are Ys", then "All Ys are Xs".
  • v. To talk; to engage in conversation.
  • n. ​(now literary) Familiar discourse; free interchange of thoughts or views; conversation; chat.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Turned about; reversed in order or relation; reciprocal.
  • n. Frequent intercourse; familiar communion; intimate association.
  • n. Familiar discourse; free interchange of thoughts or views; conversation; chat.
  • n. A proposition which arises from interchanging the terms of another, as by putting the predicate for the subject, and the subject for the predicate.
  • n. A proposition in which, after a conclusion from something supposed has been drawn, the order is inverted, making the conclusion the supposition or premises, what was first supposed becoming now the conclusion or inference. Thus, if two sides of a sides of a triangle are equal, the angles opposite the sides are equal; and the converse is true, i.e., if these angles are equal, the two sides are equal.
  • intransitive v. To keep company; to hold intimate intercourse; to commune; -- followed by with.
  • intransitive v. To engage in familiar colloquy; to interchange thoughts and opinions in a free, informal manner; to chat; -- followed by with before a person; by on, about, concerning, etc., before a thing.
  • intransitive v. To have knowledge of, from long intercourse or study; -- said of things.

from The Century Dictionary and Cyclopedia

  • To keep company; associate; hold intercourse: followed by with.
  • To talk informally with another; have free intercourse in mutual communication of opinions and sentiments by spoken words; interchange thoughts by speech; engage in discourse: followed by with before the person addressed, and on before the subject.
  • To have sexual commerce. Guardian.
  • Turned about; transposed; reciprocal.
  • n. A part answering or corresponding to another, but differing from it in nature and required to make it complete; a complement; a counterpart: as, the hollows in a mold in which a medal has been cast are the converse of the parts of the medal in relief. [Converse is often used incorrectly in the sense of reverse— that is, the opposite, the contrary.
  • n. In logic: Either of the pair of relations which subsist between two objects, with reference to each other: thus, the relation of child to parent is the converse of the relation of parent to child. One of a pair of propositions having the same subject and predicate or antecedent and consequent, but in the reversed order.
  • n. Acquaintance by frequent or customary intercourse; familiarity: as, to hold converse with persons of different sects, or to hold converse with terrestrial things.
  • n. Conversation; familiar discourse or talk; free interchange of thoughts or opinions.
  • n. Sexual commerce.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. turned about in order or relation
  • n. a proposition obtained by conversion
  • adj. of words so related that one reverses the relation denoted by the other
  • v. carry on a conversation


Middle English conversen, to associate with, from Old French converser, from Latin conversārī : com-, com- + versārī, to occupy oneself; see wer-2 in Indo-European roots.
Latin conversus, past participle of convertere, to turn around; see convert.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Old French converser, from Latin conversare ("live, have dealings with") (Wiktionary)
From Latin conversus ("turned around"), past participle of converto ("turn about") (Wiktionary)



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